For your first finished Dubstep tune this is pretty damn solid. I like the flow alot , it's got a nice swing to it along with the bass that fits well. Your kick could use some low freq's (around 100hz) and some punch.
overall i like it
melo could also work in a dnb or trance track
Dub is hard to make, good work dude !!!!
keep it on
5/5 9/10 - perfect is boring